Datasheet

74HC_HCT7540 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 4 — 31 December 2012 5 of 16
NXP Semiconductors
74HC7540; 74HCT7540
Octal Schmitt trigger buffer/line driver; 3-state; inverting
10. Dynamic characteristics
V
OL
LOW-level
output voltage
V
I
= V
T+
or V
T
; V
CC
= 4.5 V
I
O
= 20 A; - 0 0.1 - 0.1 - 0.1 V
I
O
= 6.0 mA; - 0.15 0.26 - 0.33 - 0.4 V
I
I
input leakage
current
V
I
= V
CC
or GND; V
CC
=5.5V - - 0.1 - 1.0 - 1.0 A
I
OZ
OFF-state
output current
per input pin; V
I
=V
T+
or V
T
;
V
O
=V
CC
or GND;
other inputs at V
CC
or GND;
V
CC
=5.5V; I
O
=0A
--0.5 - 5.0 - 10 A
I
CC
supply current V
I
=V
CC
or GND; I
O
= 0 A;
V
CC
=5.5V
- - 8.0 - 80 - 160 A
I
CC
additional
supply current
per input pin; I
O
=0A;
V
I
=V
CC
 2.1 V;
other inputs at V
CC
or GND;
V
CC
= 4.5 V to 5.5 V
An input - 20 72 - 90 - 98 A
OE
n input - 130 468 - 585 - 637 A
C
I
input
capacitance
-3.5- - - - - pF
Table 6. Static characteristics
…continued
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions T
amb
= 25 C T
amb
= 40 C
to +85 C
T
amb
= 40 C
to +125 C
Unit
Min Typ Max Min Max Min Max
Table 7. Dynamic characteristics
GND = 0 V; C
L
= 50 pF; for test circuit see Figure 7.
Symbol Parameter Conditions T
amb
= 25 C T
amb
= 40 C to +125 C Unit
Min Typ Max Max (85 C) Max (125 C)
74HC7540
t
pd
propagation delay An to Yn; see Figure 5
[1]
V
CC
= 2.0 V - 39 120 150 180 ns
V
CC
= 4.5 V - 14 24 30 36 ns
V
CC
= 5.0 V; C
L
=15pF - 11 - - - ns
V
CC
= 6.0 V - 11 20 26 31 ns
t
en
enable time OEntoYn; see Figure 6
[1]
V
CC
= 2.0 V - 41 150 190 225 ns
V
CC
= 4.5 V - 15 30 38 45 ns
V
CC
= 6.0 V - 12 26 33 38 ns
t
dis
disable time OEntoYn; see Figure 6
[1]
V
CC
= 2.0 V - 52 150 190 225 ns
V
CC
= 4.5 V - 19 30 38 45 ns
V
CC
= 6.0 V - 15 26 33 38 ns